-- former secretary of state called the kidnapping of hundreds of school girls abominable. And called on the government of Nigeria to do more late today First Lady Michelle Obama -- her voice to the chorus calling for urgent action under the banner. Bring back our girls. And tonight ABC's -- MacDonald is on the ground in Nigeria to show what's the dark forest where the girls have vanished. This is devoted families returned to the school at school. Where they do his were taken. The anguished cries tell a story of lost. That -- wonder how he's man says he wants the world to know. We don't feel Nigeria can help get out to his back. -- -- three days -- -- the kidnapping frustration and anger here is simmering. Today amid reports of fresh attacks by -- around killing hundreds of people. -- self for the reward 300000. Dollars for any information. The -- -- Do you think that. -- government is doing everything that can be done no we don't think so that's always been what we're doing that's -- -- -- advocates see that's whipping up protest. This may be a tiny group that they -- -- genuinely global movement to bring back these Google's. They know as well as anyone how difficult that -- will be. Adding to growing international support detainment of some ten US military personnel. The rise in the coming -- -- specialists in logistics and intelligence. The challenge for Nigeria is enormous. -- -- will focus here the centerpiece of forest where it's thought the girls were taken. Remote rugged wilderness more than six times the size of Yellowstone National Park. I think the one thing that's almost certain is that the young girls are no longer together. They've almost certainly are dispersed and in small groups or even individuals. Some -- possibly -- radeon of the country sold into slavery. It's what happened to this young woman here in the shadows. She says she was taken last year by the Islamist militant group and held for three months forced to sleep in -- she thought death was certain. Young girls like Mulally used his side. -- this battle for the right to education. Is a global one. He -- -- this happen more and more and more. If you warned to stop again we have to speak. Speak and act the pressure is now on Nigeria's government to do just that. -- -- told ABC news the -- Nigeria.

This transcript has been automatically generated and may not be 100% accurate.

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